133455738 has 64 divisors (see below), whose sum is σ = 304819200. Its totient is φ = 38653440.

The previous prime is 133455719. The next prime is 133455743. The reversal of 133455738 is 837554331.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 133455696 and 133455705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92023 + ... + 93461.

It is an arithmetic number, because the mean of its divisors is an integer number (4762800).

Almost surely, 2^133455738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133455738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152409600).

133455738 is an abundant number, since it is smaller than the sum of its proper divisors (171363462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133455738 is a wasteful number, since it uses less digits than its factorization.

133455738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527.

The product of its digits is 151200, while the sum is 39.

The square root of 133455738 is about 11552.3044454343. The cubic root of 133455738 is about 511.0292401981.

The spelling of 133455738 in words is "one hundred thirty-three million, four hundred fifty-five thousand, seven hundred thirty-eight".